Add in Any Order: Rearrange Addends, Maintain Total Sum
Introduction:
Add in any order:
We can change the order of the addends. The sum is the same.
4 and 5 is 9.
5 and 4 is 9.
We can write two addition equations.
4 plus 5 is 9.
5 plus 4 is 9.
Example1:
Colour to change the order of the addends. Then write the addition equation.
Sol:
1 and 5 is 6.
1 + 5 = 6
5 and 1 is 6.
5 + 1 = 6
Two addition equations
1 + 5 = 6
5 + 1 = 6
Example2:
You have 3 boxes. Tom brings 4 more. How many total boxes do you have? Write two addition equations.
Sol:
You have boxes = 3
Tom brings more = 4
Total boxes you have
3 + 4 = 7
You can change the order of addends. The sum is the same.
4 + 3 = 7
You have 7 boxes.
Example3:
Use the numbers on the cards to write two addition equations.
Sol:
We have cards
We can write two addition equations.
6 = 4 + 2
6 = 2 + 4
You can change the order of addends. The sum is the same.
Example 4:
Sanely and Anna collected 6 flowers. Then they collect 3 more. How many flowers do they collect in all? Write two different addition equations.
Sol:
Sanely and Anna collect flowers = 6
They collect more = 3
They collect total flowers = 6 + 3 = 9
(or)
= 3 + 6
= 9
They collect 9 flowers.
Exercise
1.Write the sum. Write the new addition equation.
2. Write the sum for given addition equations.
3. Write the sum. Then change the order of the addends. Write the new addition equation.
4. Write two addition equations for the given image.
5. Use the number on the cards to write two addition equations.
6. Write the sum. Then change the order of the addends. Write the new addition equation.
7. How can you use cubes to show that 5 + 4 is the same as 4 + 5?
8. There are 4 roses and 5 sunflowers in my garden. How many flowers are there in all? Write two addition equations.
9. 5 boys are playing in the garden. 3 girls also join in. how many kids are there? Write two different equations.
10. There are 6 birds sitting on a tree. 3 more come there. How many birds are there in alll?
Concept Map:
What We Have Learned
- Add in any order
- Write the sum for given addends
- Change the order of the addends
- Write the new addition equations
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